JPH08207775A - Motor-driven dolly - Google Patents

Abstract

PURPOSE: To obtain power for travel and other action by one reduction assistor by providing the reduction assistor, connected to the output side of a motor, with two output shafts that are a truck propulsion shaft and a shaft to be other power source, and switching the output shafts by the normal and reverse rotation of the motor. CONSTITUTION: In the case of switching a change-over switch 17 to the travel side, relays 25 are formed into a circuit connected by continuous lines, and a motor 3 is rotated clockwise. When the torque is transmitted to a reduction assistor, a roller 23b in a one-way clutch housing 24b. The power of the motor 3 is thereby transmitted to a gear 20a through the gear 20b and further transmitted to a travel driving shaft 5 to make a truck travel. When the change-over switch 17 is switched to the lift side, the motor 3 is reversely rotated, and a hydraulic pump is driven by the rotation of the pump driving shaft 6. Generated oil pressure is transmitted to a pallet lifting cylinder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric carrier having a function of easily carrying a large load or a heavy load with a small force and performing other operations.

[0002]

2. Description of the Related Art An electric transport vehicle using a device that performs a propulsion function and other operation functions with a single deceleration booster is disclosed in Japanese Utility Model Publication 57-15.
No. 9861 is known.

According to the present invention, a hydraulic jack used for driving and lifting wheels using a clutch for manually switching a lever on a driving output shaft for running and other operations (lifting) by one deceleration booster. It is disclosed that the drive of the operation pump is switched to perform traveling and lifting with one deceleration booster.

[0004]

According to this known document, since the traveling and the lift are operated by a clutch which is switched by using a manual lever, the clutch lever is erroneously operated to cause an operation contrary to a user's intention. Will end up. Further, if the operation is performed uncertainly, the clutch is not sufficiently meshed with each other, and the life of the clutch is shortened due to wear or the clutch is disengaged during the operation.

The object of the present invention is to obtain the power of other operations such as pulling of luggage by connecting to the output of each output shaft according to the purpose of use, such as rotation and slide of the loading platform, and winches, in addition to the traveling and lifting functions. An object of the present invention is to provide an electric carrier provided with one deceleration booster that can be used.

[0006]

In order to achieve the above object, in the electric transport vehicle of the present invention, the deceleration booster has a traveling shaft and two output shafts for other operations. As for the output shaft, a shaft is formed on the inner side of the one-way clutch, and a gear is formed on the outer side to engage them.
By the reverse rotation, the traveling shaft and the other operation shafts are exchanged to obtain power for traveling and each other operation.

[0007]

In the electric transport vehicle according to the present invention, the deceleration booster has a traveling shaft and two output shafts for other operations. Each output shaft has a shaft on the inner side of the one-way clutch and a gear on the outer side. Are connected and meshed, and the power of the traveling shaft and other operation shafts is exchanged by the forward and reverse rotations of the motor to obtain power for traveling and other operations, respectively, without using a complicated manual switching clutch. One deceleration booster can provide power for traveling and other movements.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 and FIG. 2 show an equipment configuration of an electric carrier for easily carrying or lifting a large load or a heavy load according to the present invention. 1, FIG. 2, and FIG. 3, 1 is a loading platform for carrying and lifting loads, 2 is a dolly for attaching the loading platform, 3 is a motor for propelling the dolly, and 4 is a propulsive force of the motor 3. The deceleration booster 5 for amplifying and for obtaining the propulsion speed and the rotation required for the lift from the motor 3 transmits the propulsion force obtained from the motor 3 and the deceleration booster 4 to the drive wheels for moving the carriage. A drive shaft 6 for driving, a pump drive shaft 6 for transmitting power obtained from the motor 3 and the deceleration booster 4 to a hydraulic pump for lifting the platform, and 7 for transmitting power to the hydraulic pump. Belt, 8 is a free wheel for supporting and changing the direction of the carriage 2, 9 is a driving wheel, and 10 is a battery for powering the motor 3 and a controller for adjusting the speed of the motor 3 is housed. And have control box, 11 truck 2
For supporting and changing the direction, 12 is a hydraulic pump, 13 is a cylinder for lifting power from the hydraulic pump, 14 is an arm for receiving power from the cylinder 13 to lift and support the platform 1, and 15 is Cylinder 1
3 is a relief pedal for taking hydraulic pressure, 16 is a speed adjusting volume for adjusting the rotation of the motor 3 via a controller, 17 is a changeover switch for selecting traveling of the truck 2 or lift operation of the loading platform 1, 18 Is a traveling lamp that lights up when the changeover switch 17 indicates a traveling operation, and 19 is a lift lamp that lights up when the changeover switch 17 indicates a lifting operation.

The operation of the carrier will be described with reference to the drawings. When the changeover switch 17 indicates the traveling side, as shown by the solid line in FIG. 7, the changeover switch 17 is not energized and the relay 25 becomes a circuit connected by the solid line. in this case,
The motor 3 is a normal rotation circuit. When the motor 3 rotates in the normal direction, it is assumed that the gear in the deceleration booster 4 rotates in the direction of the arrow in FIG. When rotating in the direction of the arrow, the roller 23b in the one-way clutch housing 24b connecting the pump driving shaft 6 and the gear 20b disconnects the pump driving shaft 6 and the clutch housing 24b. Then, the power from the motor 3 is not transmitted to the pump driving shaft 6 but is transmitted to the gear 20a via the gear 20b. On the other hand, the gear 20a rotates in the opposite direction to the gear 20b due to the operating principle of the gear, and at the same time, the clutch housing 24a also rotates in the opposite rotation. Then, the roller 23a moves to the drive shaft 5
Since the vehicle is sandwiched between the clutch housing 24a and the friction of the contact surface increases, the power of the motor 3 is transmitted to the drive shaft 5 and the drive wheels 9 connected to the drive shaft 5, and the trolley 1 travels. To do. Next, when the changeover switch 17 indicates the lift side, the changeover switch 17 is energized as shown by the dotted line in FIG.
5 is a circuit connected by a dotted line. In this case, the motor 3
Is a reverse circuit. When the motor 3 rotates in the reverse direction, the motor 3 rotates in the opposite direction to that in traveling. Then, as shown in FIG. 6, the one-way clutch performs a function opposite to that during traveling, the roller 23b on the pump driving shaft 6 side is sandwiched between the clutch housing 24b and the pump driving shaft 6, and the contact friction becomes large, thereby driving the pump. The shaft 6 is rotated. However, due to the principle of gears, the drive shaft 5 side rotates in the reverse direction, so that the one-way clutch is released and the power transmission of the drive shaft 5 is lost. Hydraulic pump 1
The power transmitted to the pump driving shaft 6 via the belt 7 for driving the motor 2 serves as power for the hydraulic pump to generate hydraulic pressure. This hydraulic pressure is transmitted to the cylinder 13 and is transferred to the loading platform 1 via the arm 14 connected to the tip of the cylinder 13.
Lift. The arm 14 has a roller 2 at the tip.
3 is arranged so that when the vehicle is lifted, it is slidably moved on the frame of the trolley 2 to make the lifting operation smooth. When lowering the loading platform, step on the relief pedal 15 to move the cylinder 13
The hydraulic pressure applied to is removed, the cylinder 13 is contracted, and the platform 1 is lowered.

Although the explanation has been given here using the lift function of the loading platform 1, it is possible to rotate the loading platform 1 by using a power transmission device such as gears, chains, belts instead of the hydraulic pump, slide function of the loading platform 1 and winches. In addition to traveling, such as an electric carrier having a function of connecting and pulling a heavy load to the loading platform 1, a function requiring power can be added according to the purpose of use.

Further, since the power of the output shaft is switched by the forward rotation and the reverse rotation of the motor, a complicated manual switching clutch is not required, maintenance of the carrier is facilitated, and at the same time clutch components such as a clutch and a lever are abolished. Since the device weight is lighter, the operating time of the trolley can be extended, and at the same time, the trolley device cost can be significantly reduced.

[0012]

According to the present invention, since the power for traveling the truck and other operations is performed by the forward and reverse rotations of the motor, a complicated manual switching clutch is not required, so that power can be reliably transmitted and safety is improved. improves. Moreover, since the output shaft is electrically switched by the switch, the usability is dramatically improved.

[Brief description of drawings]

FIG. 1 is a side view of an electric carrier according to the present invention.

FIG. 2 is a plan view of the lower portion of the electric carrier according to the present invention.

FIG. 3 is a plan view of a control operation unit.

FIG. 4 is a plan view showing the mounting of the one-way clutch.

FIG. 5 is an explanatory diagram of the operation of the one-way clutch during normal rotation of the motor.

FIG. 6 is an explanatory diagram of the operation of the one-way clutch when the motor rotates in reverse.

FIG. 7 is an electric circuit diagram for switching between forward and reverse rotation of the motor according to the present invention.

[Explanation of symbols]

5 ... Drive shaft, 6 ... Pump drive shaft, 7 ...
Belt, 12 ... Hydraulic pump, 13 ... Cylinder, 14 ... Arm, 15 ... Relief pedal, 17 ... Changeover switch, 20 ... Gear, 22 ... Push spring, 23 ... Roller, 24
… Clutch housing, 25… Relay.

Front page continued (72) Inventor Toshikatsu Ito 5 3085, Higashi Ishikawa Nishikonai, Hitachinaka City, Ibaraki 5 Hitachi Car Electronics Co., Ltd. (72) Inventor Takayuki Ninomiya 5 3085, Nishi Kouchi Higashi Ishikawa, Hitachinaka City, Ibaraki 5 Hitachi Car Electronics Co., Ltd. In the company (72) Inventor Toshio Ito 5 3085, 3085 Nishikouchi, Higashiishikawa, Hitachinaka City, Ibaraki Hitachi Car Electronics Co., Ltd.

Claims (2)

[Claims] 1. A trolley for loading and carrying luggage and other operations, a motor for driving and propelling the trolley, a deceleration booster for amplifying the propulsive force of the motor, and a motor for the motor. In an electric transport vehicle including a battery as an electric power source and a controller for controlling the propulsive force of the motor, the deceleration booster serves as a shaft for propelling the cart and another power source. The shaft has two output shafts, and the output shafts are connected to gears and shafts via a one-way clutch, and the output shafts are switched by the forward and reverse rotations of the motor. An electric carrier that can be used to drive the power of a single deceleration booster. 2. The electric transport vehicle according to claim 1, wherein the output shaft has a shaft that forms an inner part of a one-way clutch and an outer part that is connected to a gear.